Problem in cropping the UIImage using CGContext?
- by Rajendra Bhole
Hi,
I developing the simple UIApplication in which i want to crop the UIImage (in .jpg format) with help of CGContext. The developed code till now as follows,
CGImageRef graphicOriginalImage = [originalImage.image CGImage];
UIGraphicsBeginImageContext(originalImage.image.size);
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGBitmapContextCreateImage(graphicOriginalImage);
CGFloat fltW = originalImage.image.size.width;
CGFloat fltH = originalImage.image.size.height;
CGFloat X = round(fltW/4);
CGFloat Y =round(fltH/4);
CGFloat width = round(X + (fltW/2));
CGFloat height = round(Y + (fltH/2));
CGContextTranslateCTM(ctx, 0, image.size.height);
CGContextScaleCTM(ctx, 1.0, -1.0);
CGRect rect = CGRectMake(X,Y ,width ,height);
CGContextDrawImage(ctx, rect, graphicOriginalImage);
croppedImage = UIGraphicsGetImageFromCurrentImageContext();
return croppedImage;
}
The above code is worked fine but it can't crop image.
The original image memory and cropped image memory i will got same(equal to original image memory).
The above code is right for cropping the image??????????????????
How i cropping the image (in behind pixels should also be crop) from the center of the image????????????
I already wasting a lot of time for developing the above code , but i didn't get answer or way to find out how to crop the image.Thanks for sending me answer in advanced.
